[markwkw]

How would an interviewer verify how much code you have delivered? And what quality that code was?

I'm not trying to sound like a smartass. This is a real problem. I've been bitten before by candidates with big stories to tell about their past deliverables, but were a fountain of bugs once they were hired. Sometimes it's easy to tell, sometimes candidates background is a bit different than yours so you can't easily judge if them writing three customized discombobulators for flux capacitance use cases is something challenging or not. What is more, barely anyone writes alone. We almost all work in teams, and it's easy to claim N% of contribution to the code the team has written. In many cases you will be able to somewhat confidently speak about other people's code since you've been reading and reviewing it.